問題詳情
17.元素甲和元素乙的原子最外層電子殼上分別有四個及七個電子，當元素甲和元素乙化合時，生成的化合物丙的化學式如何寫最適當？
(A)甲4乙
(B)甲乙
(C)甲4乙
(D)甲7乙4。
(A)甲4乙
(B)甲乙
(C)甲4乙
(D)甲7乙4。
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
內容推薦
- I ______ fond of English since I ______ part in the English summer camp two years ago.(A) had be
- 【題組】(A) Nevertheless (B) From that time on (C) Besides (D) However
- I love to ______ my friends when we go swimming.(A) target (B) consider (C) element (D) splash
- A ____ thinks about the next elections－ a____ thinks about the next generations.(A)statesman ; p
- “Royal Love Scandal” ____ in today’s newspaper.(A)bursts into (B)strips away (C)makes the headli
- For thousands of years, people ______ that no two people have the same fingerprints.(A) knew (B)
- 【題組】(A) installed (B) was installed (C) was installing (D) had being installed
- It is ______. Traffic may not be good.(A) rush hour (B) happy hour (C) zero hour (D) visiting ho
- Global warming has caused sea levels to rise worldwide, putting low-lying cities like Venice in
- There ______ a lot of changes here in the last ten years.(A) was (B) were (C) has been (D) have
內容推薦
- ＜34-39題組＞ Up north in Alaska, there are not so many bug but there are _(34)_ of fish. People there l
- 【題組】(A)is drilling (B)is sacrificing (C)is spreading (D)is inserting
- III.克漏字選擇(20%) A recent study shows that on average, the people of Venezuela spend more time thinki
- 下列分子中哪些具有參鍵？ (A)CH(B)CO(C)H2O (D)HCN。
- “Your____ more than your aptitude determines your altitude,” said Zig Ziglar.(A)magnitude (B)lon
- 【題組】(A)motivation (B)enthusiasm (C)sympathy (D)compliments
- People ______ that humankind ______ more planets by the end of 21st century.(A) will believe ; w
- Selecting a cell phone for personal use is no easy task because technology ______ so rapidly.(A)
- 電解質導電，是利用何種可自由移動的帶電粒子？ (A)離子 (B)質子 (C)價電子 (D)自由電子。
- The police searched the house of the suspect____ . They almost turned the whole house upside dow
- 【題組】(A) make (B) makes (C) made (D) making
- 綜合測驗 【24%】＜29-33題組 ＞ There are annual run-up races in famous buildings like the Empire State Bu
- 【題組】(A)pursuit (B)protection (C)protein (D)physics
- 下列何物質可以導電？ (A)C2H5OH(aq) (B)HCl(l) (C)NaCl(s) (D)Ag(s)。
- 【題組】(A) how (B) where (C) what (D) when
- 【題組】(A)observation (B)obsession (C)organization (D)occasion
- 哪些不是一般有機物的通性？ (A)共價化合物 (B)易燃性 (C)難溶於水 (D)高熔點。
- 【題組】(A)all at once (B)once in a while (C)as a result (D)in addition
- 【題組】(A) make (B) making (C) to make (D) made
- 【題組】(A)used (B)to use (C)use (D)using
- 【題組】(A)as (B)by (C)for (D)to
- IV.文意選填(10%) When someone speaks of a phobia, they are talking about a fear of something. “Phobia”
- 【題組】(A) desire (B) distance (C) design (D) description
- 【題組】(A) supply (B) cherish (C) chilly (D) available
- 【題組】Which of the following statements is true about Universal Esperanto Association (UEA)?(A) On